The state of California released new digital maps of its earthquake faults and general geology today to coincide with the state Geological Survey’s 150th anniversary.

The maps, available at the California Geological Survey website replace the geologic map last updated in 1977 and the fault map last updated in 1994.  Earthquake faults are color-coded by activity level; with red colors designating active faults like the San Andreas and Hayward faults, with cooler colors to mark faults that are much less active.

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The geological map is only the state’s fifth map since 1860, a time when geologists were much more concerned with finding California’s precious metals than marking fault lines.

"All of the previous versions of these maps were done the old-fashioned way," state geologist John Parrish told the Silicon Valley Mercury News. "It's very clear what you're seeing (with the new maps.) It's very detailed."